ECM7 non-Windows encoding crash when affine is off

ECM-7 encoding crash (sometimes deadloop) was observed when affine is off by --Affine=0 --AffineMMVD=0. The issue may be reproduced with the following command under Linux.

./EncoderAppStatic -c ../cfg/encoder_randomaccess_ecm.cfg -c ../cfg/per-sequence/BQSquare.cfg -i ~/sequences/BQSquare_416x240_60.y4m -v 6 -dph 1 -f 9 -q 37 --AffineMMVD=0 --Affine=0

A fix MR will be submitted later today.